Anticreekotg device



A. L. MERRIN.

ANTICREEPING DEVICE.

APPLICATION FILED AUG.1B, 1915.

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ARTHUR L. MERRIN, OF PORTLAND, OREGON.

ANTIGREEPING DEVICE.

Application filed August 18, 1915.

To all whom it may concern:

Be it known that I, ARTHUR L. MERRIN, a citizen of the United States, and a resident of Portland, county of Multnomah, State of Oregon, have invented a new and useful Improvement in Anticreeping Devices, of which the following is a specification.

This invention relates to anti-creeping devices which are used for preventing the slipping of bodies relative to each other, and has particularly to do with anti-creeping shoes for ladders to be used on roofs or other inclined surfaces.

One of the main objects of this invention is to provide a reliable form of anti-creeping shoe which may be readily "clamped to the foot or sides of a ladder when the latter is to stand or lie on an inclined roof.

Roof ladders are dangerous when not securely held against slipping, and the present invention provides an inexpensive, light, and eflicient, shoe which may be readily clamped onto or detached from roof ladders. These shoes are formed with claw-like grip-- pers, and the weight imposed on the ladder when being used will cause the claws to engage the roof and prevent slipping of the ladder thereon. When the ladder lies flat on an inclined roof, a plurality of these shoes are clamped on the sides of the ladder. When the ladder is standing on an inclined roof, the shoes are clamped on the foot of said ladder.

The features of my invention are all fully set forth in the accompanying drawings, in which:

Figure 1 is a sectional view of an inclined roof, showing a ladder lying thereon. On the sides of the ladder are clamped the anticreeping shoes which prevent said ladder from slipping. Fig. 2 is a sectional View of a porch roof showing a ladder standing thereon, the foot of the ladder being equipped with the anti-creeping shoes. Fig. 3 is a larger scaled side elevation of one of the shoes, Fig. 4: is a left end elevation of the same, and Fig. 5 is a vertical section taken on the line 55 of Fig. 4:.

a represents an inclined roof, and a ladder comprising sides I), and rungs 0 is shown lying thereon. The anti-creeping shoe used Specification of Letters Patent.

Patented Aug. ill, lilillfi.

Serial No. 46,211.

on said ladder is represented in its entirety by the letter (Z. Said shoe is made in the form of a channel-like member having the side walls 6 and f, the base 9, the forward claws and the rear claws z. The ends of the base 9 are up-turned so as to form the spacer members 7' and is. The side-wall e is provided on its inner face with a plurality of gripper points we and on the outer face of the side-wall f is a boss a, in which is threaded a thumb screw 0. On the inner end of the thumb screw is a clamping head p.

The general operation of my device is as follows: When a ladder is to lie fiat on an inclined roof, as shown in Fig. l, a plurality of the anti-creeping shoes d are attached to the sides of the ladder in the following manner: The sides I) of the ladder are laid in the channel between the side-walls e and f, and rest on the spacing members a and 7c. The thumb screw 0 is then turned in its bearing until the side of the ladder is rigidly clamped between the side wall 6, and the clamping head 79. Any tendency of the ladder to slip will then be eliminated by reason of the claws It, and e digging into the roof, and at the same time, the ladder will be spaced uniformly from the roof.

Referring to Fig. 2, the anti-creeping shoes are shown in their relationship to the foot of the ladder when the latter is to be used standing on a roof instead of lying flat thereon. In this case, the lower ends of the sides of the ladder will abut against the rear spacing member j as shown in the broken lines of Fig. 5, and the clamping screw will hold the ladder and shoe rigidly fixed relative to each other.

It is evident that an anti-creeping shoe of this character may be applied to other uses, and I do not therefore confine myself to the use of same in connection wlth roof ladders alone.

I claim:

In an anti-slipping device, the combination of a channel frame, means for clamping a member between the channel sides, claw-like projections on the under side of said frame, and upwardly projecting members at the ends of the channel.

ARTHUR L. MERRIN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

